package com.itheima.reggie.controller;



import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.pojo.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/shoppingCart")
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;


    @GetMapping("/list")
    public R list(){
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,BaseContext.getId());
        lqw.orderByDesc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(lqw);
        return R.success(list);
    }

    @PostMapping("/add")
    public R add(@RequestBody ShoppingCart shoppingCart){
        long id = BaseContext.getId();
        shoppingCart.setUserId(id);
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,id);
        if (dishId!=null){
            lqw.eq(ShoppingCart::getDishId,dishId);
        }else {
            lqw.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(lqw);
        if (cartServiceOne!=null){
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne = shoppingCart;
        }
        return R.success(cartServiceOne);
    }

    @DeleteMapping("/clean")
    public R delete(){
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,BaseContext.getId());
        shoppingCartService.remove(lqw);
        return R.success("删除成功");
    }

    @PostMapping("/sub")
    public R deleteById(@RequestBody ShoppingCart shoppingCart){
        long baseId = BaseContext.getId();
        shoppingCart.setUserId(baseId);
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        if (dishId!=null){
            lqw.eq(ShoppingCart::getDishId,dishId);
        }else {
            lqw.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(lqw);
        if (cartServiceOne.getNumber()>1){
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number-1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            shoppingCartService.remove(lqw);
        }
        return R.success("移除成功");
    }
}
